Saudi Basic Industries Corporation

Sirajudeen Mohamed

Wei Xu

Atieh Abu-Raqabah

Vugar O Aliyev

Atieh Aburaqabah

Ali Saad Headan

The invention is directed to a process for the production of high density polyethylene by polymerization of ethylene in the presence of a supported chromium oxide based catalyst and an activator characterized in that the activator comprises the reaction mixture of a boron compound and/or an alkyl aluminum compound and a nitrogen containing compound wherein the boron compound is a (C-C) alkyl boron compound or a (C-C) aromatic boron compound, wherein the alkyl aluminum compound is an organo aluminum compound having the formula AIRin which R is a hydrocarbon radical containing 1-10 carbon atom and wherein the nitrogen containing compound comprises &#x2014;NH, &#x2014;NHR, &#x2014;NR, wherein R may be an alkyl or a substituted alkyl having from 1 to 40 carbon atoms.

Process for the production of an ethylene polymer using a chromium containing catalyst

The present invention relates to a process for the polymerization of olefins, comprising the steps of introducing at least one olefin, at least one polymerization catalyst, at least one cocatalyst and at least one cocatalyst aid, and optionally a scavenger, into a polymerization reactor, and polymerizing the olefin, wherein the cocatalyst aid is a reaction product prepared separately prior to the introduction into the reactor by reacting at least one metal alkyl compound of group IIA or IIIA of the periodic system of elements and at least one compound (A) of the formula RXR', wherein R is a branched, straight, or cyclic, substituted or unsubstituted, hydrocarbon group having 1 to 30 carbon atoms, R&#x2032; is hydrogen or any functional group with at least one active hydrogen, X is at least one heteroatom selected from the group of O, N, P or S or a combination thereof, and wherein n and m are each at least 1 and are such that the formula has no net charge.

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Riyadh, Saudi Arabia

Sirajudeen Mohamed